./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:45:35,204 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:45:35,260 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:45:35,265 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:45:35,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:45:35,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:45:35,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:45:35,289 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:45:35,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:45:35,289 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:45:35,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:45:35,290 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:45:35,290 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:45:35,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:45:35,290 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:45:35,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:45:35,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:45:35,290 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:45:35,291 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:45:35,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:45:35,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:45:35,292 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2025-03-16 13:45:35,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:45:35,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:45:35,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:45:35,534 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:45:35,534 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:45:35,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2025-03-16 13:45:36,616 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44786ddfb/06cb7fb9e0d84379a5e12b14075dd6c7/FLAG184f6ca54 [2025-03-16 13:45:36,848 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:45:36,853 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2025-03-16 13:45:36,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44786ddfb/06cb7fb9e0d84379a5e12b14075dd6c7/FLAG184f6ca54 [2025-03-16 13:45:37,204 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44786ddfb/06cb7fb9e0d84379a5e12b14075dd6c7 [2025-03-16 13:45:37,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:45:37,208 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:45:37,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:45:37,210 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:45:37,213 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:45:37,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dba2e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37, skipping insertion in model container [2025-03-16 13:45:37,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,227 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:45:37,324 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2025-03-16 13:45:37,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:45:37,344 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:45:37,350 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2025-03-16 13:45:37,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:45:37,370 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:45:37,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37 WrapperNode [2025-03-16 13:45:37,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:45:37,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:45:37,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:45:37,377 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:45:37,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,397 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2025-03-16 13:45:37,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:45:37,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:45:37,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:45:37,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:45:37,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,405 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,418 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-16 13:45:37,419 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,419 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,422 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,427 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,428 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:45:37,430 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:45:37,431 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:45:37,431 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:45:37,432 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (1/1) ... [2025-03-16 13:45:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:45:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:45:37,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 13:45:37,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 13:45:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:45:37,478 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 13:45:37,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:45:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:45:37,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:45:37,524 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:45:37,526 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:45:37,649 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: call ULTIMATE.dealloc(main_~#A~0#1.base, main_~#A~0#1.offset);havoc main_~#A~0#1.base, main_~#A~0#1.offset; [2025-03-16 13:45:37,669 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-03-16 13:45:37,669 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:45:37,676 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:45:37,676 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:45:37,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:45:37 BoogieIcfgContainer [2025-03-16 13:45:37,676 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:45:37,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:45:37,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:45:37,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:45:37,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:45:37" (1/3) ... [2025-03-16 13:45:37,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113a9e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:45:37, skipping insertion in model container [2025-03-16 13:45:37,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:45:37" (2/3) ... [2025-03-16 13:45:37,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113a9e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:45:37, skipping insertion in model container [2025-03-16 13:45:37,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:45:37" (3/3) ... [2025-03-16 13:45:37,684 INFO L128 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2025-03-16 13:45:37,695 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:45:37,697 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG init-non-constant-2-n-u.c that has 2 procedures, 18 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-16 13:45:37,729 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:45:37,738 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a1d559, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:45:37,738 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:45:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:45:37,744 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:45:37,744 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:45:37,744 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:45:37,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:45:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1811361629, now seen corresponding path program 1 times [2025-03-16 13:45:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:45:37,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371684780] [2025-03-16 13:45:37,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:37,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:45:37,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:45:37,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:45:37,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:37,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:45:37,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:45:37,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371684780] [2025-03-16 13:45:37,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371684780] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:45:37,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292263148] [2025-03-16 13:45:37,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:37,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:45:37,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:45:37,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:45:37,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:45:37,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:45:37,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:45:37,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:37,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:37,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 13:45:37,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:45:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:45:37,958 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:45:37,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292263148] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:45:37,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:45:37,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 13:45:37,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547638342] [2025-03-16 13:45:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:45:37,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:45:37,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:45:37,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:45:37,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:45:37,980 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:45:37,991 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2025-03-16 13:45:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:45:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2025-03-16 13:45:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:45:37,996 INFO L225 Difference]: With dead ends: 34 [2025-03-16 13:45:37,996 INFO L226 Difference]: Without dead ends: 15 [2025-03-16 13:45:37,998 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:45:38,001 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:45:38,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:45:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-16 13:45:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-16 13:45:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2025-03-16 13:45:38,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 16 [2025-03-16 13:45:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:45:38,027 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2025-03-16 13:45:38,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2025-03-16 13:45:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:45:38,028 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:45:38,028 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:45:38,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:45:38,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 13:45:38,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:45:38,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:45:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1034198339, now seen corresponding path program 1 times [2025-03-16 13:45:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:45:38,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884448781] [2025-03-16 13:45:38,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:45:38,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:45:38,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:45:38,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:38,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:45:38,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884448781] [2025-03-16 13:45:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884448781] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:45:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:45:38,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:45:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441342722] [2025-03-16 13:45:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:45:38,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:45:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:45:38,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:45:38,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:45:38,399 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:45:38,448 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2025-03-16 13:45:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:45:38,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2025-03-16 13:45:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:45:38,449 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:45:38,449 INFO L226 Difference]: Without dead ends: 23 [2025-03-16 13:45:38,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:45:38,450 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:45:38,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:45:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-16 13:45:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2025-03-16 13:45:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2025-03-16 13:45:38,454 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 16 [2025-03-16 13:45:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:45:38,454 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2025-03-16 13:45:38,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:38,455 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2025-03-16 13:45:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:45:38,455 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:45:38,455 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:45:38,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:45:38,455 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:45:38,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:45:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash 994550495, now seen corresponding path program 1 times [2025-03-16 13:45:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:45:38,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844603016] [2025-03-16 13:45:38,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:45:38,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:45:38,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:45:38,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:38,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:38,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:45:38,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844603016] [2025-03-16 13:45:38,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844603016] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:45:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:45:38,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:45:38,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473420677] [2025-03-16 13:45:38,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:45:38,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:45:38,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:45:38,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:45:38,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:45:38,544 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:45:38,572 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2025-03-16 13:45:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:45:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-16 13:45:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:45:38,573 INFO L225 Difference]: With dead ends: 34 [2025-03-16 13:45:38,573 INFO L226 Difference]: Without dead ends: 22 [2025-03-16 13:45:38,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:45:38,575 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:45:38,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:45:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-16 13:45:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2025-03-16 13:45:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-16 13:45:38,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 18 [2025-03-16 13:45:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:45:38,580 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-16 13:45:38,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-16 13:45:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:45:38,582 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:45:38,582 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:45:38,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 13:45:38,583 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:45:38,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:45:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1683382377, now seen corresponding path program 1 times [2025-03-16 13:45:38,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:45:38,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616537587] [2025-03-16 13:45:38,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:38,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:45:38,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-16 13:45:38,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:45:38,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:38,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:45:38,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474889345] [2025-03-16 13:45:38,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:38,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:45:38,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:45:38,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:45:38,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:45:38,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-16 13:45:38,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 13:45:38,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:38,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:38,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 13:45:38,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:45:38,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:45:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:38,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:45:39,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-16 13:45:39,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2025-03-16 13:45:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:39,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:45:39,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616537587] [2025-03-16 13:45:39,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:45:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474889345] [2025-03-16 13:45:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474889345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:45:39,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:45:39,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2025-03-16 13:45:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911877723] [2025-03-16 13:45:39,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:45:39,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 13:45:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:45:39,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 13:45:39,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:45:39,158 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:39,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:45:39,456 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2025-03-16 13:45:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:45:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-03-16 13:45:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:45:39,457 INFO L225 Difference]: With dead ends: 56 [2025-03-16 13:45:39,458 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 13:45:39,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:45:39,458 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:45:39,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 94 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:45:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 13:45:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 24. [2025-03-16 13:45:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2025-03-16 13:45:39,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2025-03-16 13:45:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:45:39,468 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2025-03-16 13:45:39,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2025-03-16 13:45:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 13:45:39,469 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:45:39,469 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:45:39,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:45:39,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 13:45:39,670 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:45:39,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:45:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1607118915, now seen corresponding path program 1 times [2025-03-16 13:45:39,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:45:39,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266112003] [2025-03-16 13:45:39,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:39,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:45:39,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-16 13:45:39,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 13:45:39,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:39,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:45:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266112003] [2025-03-16 13:45:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266112003] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:45:39,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231518649] [2025-03-16 13:45:39,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:45:39,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:45:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:45:39,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:45:39,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:45:39,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-16 13:45:39,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 13:45:39,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:45:39,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:39,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:45:39,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:45:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:39,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:45:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231518649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:45:39,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:45:39,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-16 13:45:39,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810199385] [2025-03-16 13:45:39,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:45:39,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:45:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:45:39,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:45:39,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:45:39,918 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:45:39,979 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2025-03-16 13:45:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:45:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2025-03-16 13:45:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:45:39,980 INFO L225 Difference]: With dead ends: 59 [2025-03-16 13:45:39,980 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 13:45:39,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:45:39,981 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:45:39,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 82 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:45:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 13:45:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2025-03-16 13:45:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:45:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2025-03-16 13:45:39,991 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 22 [2025-03-16 13:45:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:45:39,991 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2025-03-16 13:45:39,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:45:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2025-03-16 13:45:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 13:45:39,992 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:45:39,992 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:45:39,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:45:40,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:45:40,193 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:45:40,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:45:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 996963133, now seen corresponding path program 2 times [2025-03-16 13:45:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:45:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402580110] [2025-03-16 13:45:40,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:45:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:45:40,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-16 13:45:40,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 13:45:40,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:45:40,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:45:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122960943] [2025-03-16 13:45:40,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:45:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:45:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:45:40,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:45:40,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:45:40,252 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-16 13:45:40,263 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 13:45:40,263 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:45:40,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:45:40,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 13:45:40,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:45:40,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:45:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:45:40,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2025-03-16 13:45:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:45:40,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:45:45,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2025-03-16 13:45:45,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 184 [2025-03-16 13:46:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:46:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402580110] [2025-03-16 13:46:37,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:46:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122960943] [2025-03-16 13:46:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122960943] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:46:37,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:46:37,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-03-16 13:46:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698094696] [2025-03-16 13:46:37,004 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 13:46:37,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:46:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:46:37,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:46:37,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=252, Unknown=9, NotChecked=0, Total=342 [2025-03-16 13:46:37,005 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:46:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:46:38,121 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2025-03-16 13:46:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:46:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2025-03-16 13:46:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:46:38,123 INFO L225 Difference]: With dead ends: 84 [2025-03-16 13:46:38,124 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 13:46:38,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=146, Invalid=397, Unknown=9, NotChecked=0, Total=552 [2025-03-16 13:46:38,125 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 13:46:38,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 102 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 13:46:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 13:46:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 36. [2025-03-16 13:46:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2025-03-16 13:46:38,141 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 22 [2025-03-16 13:46:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:46:38,141 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2025-03-16 13:46:38,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:46:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2025-03-16 13:46:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:46:38,141 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:46:38,142 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:46:38,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:46:38,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:38,346 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:46:38,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:46:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1060398899, now seen corresponding path program 2 times [2025-03-16 13:46:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:46:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861232243] [2025-03-16 13:46:38,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:46:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:46:38,352 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 13:46:38,359 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:46:38,359 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:46:38,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:46:38,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735008393] [2025-03-16 13:46:38,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:46:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:46:38,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:46:38,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:46:38,396 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 13:46:38,410 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:46:38,411 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:46:38,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:38,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-16 13:46:38,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:46:38,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:46:38,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-16 13:46:39,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:46:39,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2025-03-16 13:46:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:46:39,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:46:39,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104 [2025-03-16 13:46:39,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 294 [2025-03-16 13:46:42,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:46:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861232243] [2025-03-16 13:46:42,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:46:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735008393] [2025-03-16 13:46:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735008393] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:46:42,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:46:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2025-03-16 13:46:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457835496] [2025-03-16 13:46:42,117 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 13:46:42,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 13:46:42,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:46:42,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 13:46:42,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:46:42,118 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:46:42,950 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2025-03-16 13:46:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:46:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-03-16 13:46:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:46:42,951 INFO L225 Difference]: With dead ends: 70 [2025-03-16 13:46:42,951 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 13:46:42,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:46:42,952 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:46:42,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:46:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 13:46:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2025-03-16 13:46:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2025-03-16 13:46:42,963 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 23 [2025-03-16 13:46:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:46:42,963 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2025-03-16 13:46:42,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2025-03-16 13:46:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:46:42,963 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:46:42,964 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:46:42,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:46:43,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:43,164 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:46:43,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:46:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1752397860, now seen corresponding path program 1 times [2025-03-16 13:46:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:46:43,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221615204] [2025-03-16 13:46:43,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:46:43,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:46:43,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:46:43,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:46:43,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:46:43,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:46:43,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:46:43,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221615204] [2025-03-16 13:46:43,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221615204] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:46:43,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741168515] [2025-03-16 13:46:43,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:46:43,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:46:43,307 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:46:43,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:46:43,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:46:43,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:46:43,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:46:43,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:43,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:46:43,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:46:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:46:43,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:46:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:46:43,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741168515] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:46:43,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:46:43,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:46:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695653315] [2025-03-16 13:46:43,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:46:43,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:46:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:46:43,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:46:43,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:46:43,627 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:46:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:46:43,774 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2025-03-16 13:46:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:46:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2025-03-16 13:46:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:46:43,775 INFO L225 Difference]: With dead ends: 103 [2025-03-16 13:46:43,775 INFO L226 Difference]: Without dead ends: 81 [2025-03-16 13:46:43,775 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:46:43,776 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:46:43,776 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:46:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-16 13:46:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 50. [2025-03-16 13:46:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2025-03-16 13:46:43,786 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 24 [2025-03-16 13:46:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:46:43,786 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2025-03-16 13:46:43,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:46:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2025-03-16 13:46:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:46:43,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:46:43,787 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:46:43,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:46:43,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:43,988 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:46:43,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:46:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash -858264225, now seen corresponding path program 3 times [2025-03-16 13:46:43,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:46:43,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075795066] [2025-03-16 13:46:43,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:46:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:46:43,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-03-16 13:46:44,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:46:44,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:46:44,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:46:44,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:46:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075795066] [2025-03-16 13:46:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075795066] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:46:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762231783] [2025-03-16 13:46:44,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:46:44,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:46:44,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:46:44,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:46:44,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-03-16 13:46:44,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:46:44,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:46:44,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:44,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:46:44,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:46:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:46:44,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:46:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:46:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762231783] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:46:44,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:46:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-16 13:46:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088755032] [2025-03-16 13:46:44,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:46:44,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:46:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:46:44,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:46:44,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:46:44,602 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:46:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:46:44,887 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2025-03-16 13:46:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:46:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2025-03-16 13:46:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:46:44,889 INFO L225 Difference]: With dead ends: 126 [2025-03-16 13:46:44,889 INFO L226 Difference]: Without dead ends: 87 [2025-03-16 13:46:44,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:46:44,889 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:46:44,890 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 106 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:46:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-16 13:46:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2025-03-16 13:46:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2025-03-16 13:46:44,912 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 26 [2025-03-16 13:46:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:46:44,912 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2025-03-16 13:46:44,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 13:46:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2025-03-16 13:46:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:46:44,914 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:46:44,914 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:46:44,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 13:46:45,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:45,115 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:46:45,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:46:45,115 INFO L85 PathProgramCache]: Analyzing trace with hash -550168184, now seen corresponding path program 2 times [2025-03-16 13:46:45,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:46:45,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188201237] [2025-03-16 13:46:45,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:46:45,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:46:45,121 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-16 13:46:45,137 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:46:45,137 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:46:45,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:46:45,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881736337] [2025-03-16 13:46:45,138 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:46:45,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:46:45,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:46:45,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:46:45,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-16 13:46:45,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:46:45,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:46:45,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:45,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 13:46:45,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:46:45,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-03-16 13:46:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:46:45,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:46:46,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2025-03-16 13:46:46,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2025-03-16 13:46:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 13:46:46,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:46:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188201237] [2025-03-16 13:46:46,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:46:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881736337] [2025-03-16 13:46:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881736337] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:46:46,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:46:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2025-03-16 13:46:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072114697] [2025-03-16 13:46:46,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:46:46,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:46:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:46:46,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:46:46,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:46:46,823 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 13:46:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:46:48,160 INFO L93 Difference]: Finished difference Result 242 states and 316 transitions. [2025-03-16 13:46:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 13:46:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2025-03-16 13:46:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:46:48,162 INFO L225 Difference]: With dead ends: 242 [2025-03-16 13:46:48,162 INFO L226 Difference]: Without dead ends: 240 [2025-03-16 13:46:48,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:46:48,163 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:46:48,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 185 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 13:46:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2025-03-16 13:46:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 107. [2025-03-16 13:46:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 13:46:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2025-03-16 13:46:48,207 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 27 [2025-03-16 13:46:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:46:48,207 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2025-03-16 13:46:48,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 13:46:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2025-03-16 13:46:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:46:48,208 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:46:48,208 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:46:48,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 13:46:48,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:46:48,412 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:46:48,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:46:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash -736512725, now seen corresponding path program 4 times [2025-03-16 13:46:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:46:48,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348523949] [2025-03-16 13:46:48,412 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:46:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:46:48,418 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-16 13:46:48,428 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:46:48,430 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:46:48,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:46:48,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851648388] [2025-03-16 13:46:48,431 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:46:48,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:46:48,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:46:48,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:46:48,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:46:48,466 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-16 13:46:48,484 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:46:48,484 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:46:48,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:46:48,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-16 13:46:48,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:46:48,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:46:48,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-16 13:46:48,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:46:48,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-16 13:46:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:46:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:46:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:46:48,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:46:48,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2025-03-16 13:46:49,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:46:49,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:46:49,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:46:49,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:46:49,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2025-03-16 13:46:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 13:46:49,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:46:58,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 302 [2025-03-16 13:46:58,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:46:58,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4754 treesize of output 4714